Christians must remember that sanctification is God's priority for their lives. It is His will for them (1 Thess 4.3; cf. Heb 12.14) and the result of Christ's death on their behalf — "who gave Himself for us to redeem us from every lawless deed, and to purify for Himself a people for His own possession, zealous for good deeds" (Titus 2.14). All believers are to live for sanctification. They have no other goal in life than to be like Jesus Christ: "The one who says he abides in Him ought himself to walk in the same manner as He walked" (1 John 2.6).
From: John MacArthur, 1 & 2 Thessalonians, MNTC, p.210.
